Bonneville County, Idaho Demographics 2026

Population Overview

Bonneville County is located in Idaho with a total population of 127,056. It is the 4th most populous county out of 44 in Idaho.

Age Demographics

The median age in Bonneville County is 33.3 years. This is 10% lower than the state median of 37.1 years. With 30.2% of the population under 18, Bonneville County has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Bonneville County is $76,646. This is 3% higher than the state median of $74,636. Compared to the national median of $78,538, household income here is 2% lower. The poverty rate stands at 9.5%. This is 11% lower than the state poverty rate of 10.6%. The unemployment rate is 3.8%. This is 4% higher than the state rate of 3.7%. The median home value is $327,000. Housing costs are 13% lower than the state median of $376,000. The home-value-to-income ratio is 4.3x. 71.6% of occupied housing units are owner-occupied. This homeownership rate is 1% lower than the state average of 72.4%.

Race & Ethnicity

The largest racial or ethnic group in Bonneville County is White (non-Hispanic), making up 80.8% of the population. Hispanic or Latino residents account for 14.2%. The Black or African American population (0.3%) is well below the state average of 0.7%.

Education

32.2% of residents aged 25 and older hold a bachelor's degree or higher. This is 3% higher than the state rate of 31.2%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.1%.